商场如战场,防人之心不可无。  
天地虽然广阔,但变化规律是相同的;万物虽然繁多,但治理原则是一致的。
Sustainability must be at the core of everything we do in the chemical industry.
The interplay between syntax and semantics is central to the study of formal languages.
The truth about the world, he said, is that anything is possible. Had you not seen it all from birth and thereby bled it of its strangeness it would appear to you for what it is, a hat trick in a medicine show, a fevered dream, a trance bepopulate with chimeras having neither analogue nor precedent, an itinerant carnival, a migratory tentshow whose ultimate destination after many a pitch in many a mudded field is unspeakable and calamitous beyond reckoning.
Psychology is a science, and teaching is an art; and sciences never generate arts directly out of themselves.
"You gave me the best of me, so you’ll give you the best of you."